Assortment of 6" wide by 12" long sheets contains 1 each of the following thicknesses: 0.005", 0.010", 0.015", 0.020", 0.025", and 0.032" Made from a high carbon 1095 hardened and tempered spring steel 0.005", 0.010", 0.015", 0.020", 0.025", 0.032" Used for various types of coiled and flat springs such as those used in electrical assemblies and steel rules Material is preferred by tool and die makers for templates and shim applications where toughness and high fatique strength are required